1、April 2010 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、97.195!$b9l“1632273www.din.deDDIN EN 15803Conservation of cultural property Test methods English translation of DIN EN 15803:2010-04Erhaltung des kulturellen Erbes Prfverfahren Englische bersetzung von DIN EN 15803:2010-04Conservation des biens culturels Mthodes dessai Traduction anglaise de DIN EN
3、15803:2010-04www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Bestimmung des Wasserdampfleitkoeffizienten (Determination of water vapour permeability (p) p) Dtermination de la permabilit la vapeur deau (p) Document comprises 16 pages04.10 DIN EN 15803:2010
4、-04 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 346 “Conservation of cultural property” (Secretariat: UNI, Italy). The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil
5、 Engineering Standards Committee), Working Committee NA 005-01-36 AA Erhaltung des kulturellen Erbes. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15803 December 2009 ICS 97.195 English Version Conservation of cultural property - Test methods - Determination pConservation des biens culturels
6、 - Mthodes dessai - Dtermination de la permabilit la vapeur deau (p) Erhaltung des kulturellen Erbes - Prfverfahren - Bestimmung des Wasserdampfleitkoeffizienten (p) This European Standard was approved by CEN on 7 November 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulatio
7、ns which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This Euro
8、pean Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the na
9、tional standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland an
10、d United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15803:
11、2009: Eof water vapour permeability ( ) EN 15803:2009 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .54 Principle 65 Symbols and abbreviations 66 Test equipment 77 Preparation of test specimens . 107.1 Number and dimensions of test specimens 10
12、8 Test procedure 108.1 General . 108.2 Test environmental conditions 108.3 Procedure 119 Expression of results . 119.1 Cumulative mass change and density of water vapour flow rate 119.2 Water vapour permeance . 129.3 Water vapour permeability . 129.4 Water vapour diffusion resistance coefficient . 1
13、29.5 Water vapour diffusion-equivalent air layer thickness . 1210 Test report . 12Bibliography . 14DIN EN 15803:2010-04 EN 15803:2009 (E) 3 Foreword This document (EN 15803:2009) has been prepared by Technical Committee CEN/TC 346 “Conservation of cultural property”, the secretariat of which is held
14、 by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2010 and conflicting national standards shall be withdrawn at the latest by June 2010. Attention is drawn to the possibility that some
15、 of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imple
16、ment this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland
17、and United Kingdom. DIN EN 15803:2010-04 EN 15803:2009 (E) 4 Introduction This test method can be applied if it does not change the value of the cultural property and follows relevant ethical codes of conservation practice. DIN EN 15803:2010-04 EN 15803:2009 (E) 5 1 Scope This European Standard spec
18、ifies a method for determining the water vapour permeability (WVP) of porous inorganic materials used for and constituting cultural property. The method may be applied to porous inorganic materials either untreated or subjected to any treatment or ageing. 2 Normative references The following referen
19、ced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. prEN 15898:2009, Conservation of cultural property Main general terms
20、and definitions concerning conservation of cultural property 3 Terms and definitions For the purposes of this document, the terms and definitions given in prEN 15898:2009 and the following apply. 3.1 porous inorganic materials materials including natural stones, e.g. sandstone, limestone, marble, as
21、 well as artificial materials, such as mortar, plaster, brick and others 3.2 water vapour flow rate G mass of water vapour transferred through the specimen per time 3.3 density of water vapour flow rate vapour transmission rate g mass of water vapour transferred through the specimen per time and per
22、 unit area 3.4 water vapour permeance Wpvalue of the mass of water vapour diffused through a specimen, induced by a partial vapour pressure gradient through the specimen, per unit area, time and partial vapour pressure difference 3.5 water vapour permeability pproduct of the water vapour permeance a
23、nd the thickness of a homogeneous specimen 3.6 water vapour permeability of air a water vapour permeability of air ais defined by the Schirmer equation: a= 0,000 023 1 (po/(p R T) (T/273 K)1,81kg/(msPa) (1) DIN EN 15803:2010-04 EN 15803:2009 (E) 6 where pois the standard barometric pressure (= 1 013
24、,25 hPa); p is the barometric pressure (hPa); T is the temperature (K); R is the gas constant for water vapour (= 462 Nm/(kgK) 3.7 water vapour diffusion resistance coefficient water vapour permeability of air divided by that of the material concerned 3.8 water vapour diffusion-equivalent air layer
25、thickness sdvalue of a specimen which indicates the thickness of a motionless air layer that has the same water vapour resistance as the specimen of thickness D. The sdvalue can be obtained in two ways: i) by multiplication of the -value with the thickness D of the specimen; ii) from the water vapou
26、r permeability of air adivided by the water vapour permeance of the specimen Wp 4 Principle Determination of the water vapour flow through the specimen subjected to different partial water vapour pressures. 5 Symbols and abbreviations For the purposes of this document, the following symbols and abbr
27、eviations apply: m mass of specimen and cup assembly, in kg D mean thickness of specimen, in m A test surface area, in m t time, in s G water vapour flow rate through specimen, in kg/s g density of water vapour flow rate, in kg/(ms) pvwater vapour pressure difference across the specimen, in Pa Wpwat
28、er vapour permeance with respect to partial vapour pressure, in kg/(msPa) pwater vapour permeability with respect to partial vapour pressure, in kg/(msPa) awater vapour permeability of air, in kg/(msPa) DIN EN 15803:2010-04 EN 15803:2009 (E) 7 water vapour diffusion resistance coefficient (-) sdwate
29、r vapour diffusion-equivalent air layer thickness, in m 6 Test equipment 6.1 Test set-ups: two types of cup systems are possible as presented in Figure 1 and Figure 2. The cups weight should be compatible with the measurement method which needs the use of an analytical balance. Test cups shall be re
30、sistant to corrosion from the desiccant or salt solutions. Typically cups are made of glass, metal or PVC. For certain cups and sealing methods, a template, with shape and size corresponding to that of the test cup, is used when applying the sealant to give a sharply defined, reproducible test area.
31、 The template shall have an area of at least 90 % of the specimen to limit non-linear vapour flow. The sealant, which is impermeable to water vapour, should neither undergo changes during the test nor bring about changes to the test surface of the specimen. NOTE Circular cups can be easier to seal.
32、Transparent cups enable observing the test in progress; thus, the saturated state of the salt solutions can be monitored. Examples of suitable sealants: a mixture of 90 % microcrystalline wax and 10 % plasticizer; a mixture of 60 % microcrystalline wax and 40 % refined crystalline paraffin. DIN EN 1
33、5803:2010-04 EN 15803:2009 (E) 8 Key 1 vessel with sorbent 2 specimen 3 sealing 4 adhesive tape 5 stop ring Figure 1 Examples of schematic cup system type 1 DIN EN 15803:2010-04 EN 15803:2009 (E) 9 Key 1 joint rubber 2 aluminium disc 3 higher trimming 4 specimen 5 lower trimming 6 PVC cup Figure 2 E
34、xample of a schematic cup system type 2 6.2 An analytical balance with an accuracy of 0,001 g, capable of weighing the test assembly. In the case of material with a porosity 1 %, an analytical balance with higher resolution (0,000 1 g) is recommended. 6.3 A test chamber to achieve controlled experim
35、ental conditions of temperature and relative humidity. The temperature is set at (23 1) C. For the relative humidity, a maximum variation of 3 % of the set point 50 % is allowed. The air velocity above the specimens shall not exceed 0,3 m/s and shall not fall short of 0,02 m/s. 6.4 Suitable sensors
36、to continuously record the temperature, relative humidity and, if necessary, the barometric pressure in the test chamber. The sensors shall be calibrated at regular intervals. 6.5 A barometer with an accuracy of 0,1 kPa. 6.6 A linear measuring device (calliper) with an accuracy of 0,1 mm. DIN EN 158
37、03:2010-04 EN 15803:2009 (E) 10 7 Preparation of test specimens 7.1 Number and dimensions of test specimens The number of specimens is related to the heterogeneity of the material. At least 3 specimens are recommended for the test. In case of anisotropy, each series shall be tested according to the
38、same orientation. The specimens shall be prepared in a way that the parallel test faces are perpendicular to the direction of water vapour flow. Specimens shall be cut as to correspond with the dimensions of the chosen test assembly (see 6.1). The thickness of the specimens will influence the time t
39、o reach the equilibrium as well as the precision of the test method. For compact and homogeneous materials it is recommended to use specimens of a thickness D of maximum 20 mm. In the case of heterogeneous materials, such as mortars containing coarse aggregates, the thickness of the specimens shall
40、be at least two times the largest particle size. The diameter of the test area (A) shall be at least two times the specimens thickness. In the case of heterogeneous materials, such as mortars containing coarse aggregates, the diameter of the test area shall be at least five times the largest grain s
41、ize. The test area shall be the arithmetic mean between the free lower tested surface and its opposite face area. The test area of the two opposite faces shall not deviate more than 10 %. The number and dimension of the specimens can be different in cases when there could be difficulties in sampling
42、 the required amount of material. 7.2 Pre-conditioning of test specimens Before testing, the specimen shall be stored at (23 1) C and (50 3) % relative humidity for a period long enough for their weight to stabilize with the test climatic conditions. Constant mass is reached when the difference betw
43、een two successive weighings at an interval of 24 h is not greater than 0,1 % of the mass of the specimen. 8 Test procedure 8.1 General The test specimen shall be mounted in the cup with the test face up and sealed to the open side of a test cup containing either a desiccant (dry cup) or an aqueous
44、saturated salt solution (wet cup). The assembly shall then be placed in the pre-conditioned test chamber. Because of the different partial water vapour pressure between the inside of the test cup and the test chamber, a water vapour flow through the specimen occurs. In order to measure the water vap
45、our permeability in the steady state, the mass of the cup system is periodically determined by means of weighing. 8.2 Test environmental conditions The procedure is based on the “dry cup” or the “wet cup” system and can use the cups shown in Figure 1 or Figure 2. One of the cup systems presented in
46、Table 1 shall be selected. Only results obtained from tests using the same cup system can be compared. DIN EN 15803:2010-04 EN 15803:2009 (E) 11 Table 1 Test conditions Cup system Boundary condition for temperature (internal and external) (C) Internal relative humidity RH (%) External relative humid
47、ity RH (%) Dry cup 23 1 0 to 3 50 3 Wet cup 23 1 93 3 50 3 Dry cup tests give information about the performance of materials at low humidities when moisture transfer is dominated by vapour diffusion. Wet cup tests give guidance about the performance of materials under high humidity conditions. At hi
48、gh humidity (93 %), the specimen pores start to fill with water which increases transport of liquid water and reduces vapour transport. Consequently, test results obtained under these conditions give some information about liquid water transport properties in porous materials. Adequate saturated sal
49、t solutions or gels are examples of suitable sorbents. The following desiccants and saturated aqueous solutions produce the specified relative air humidity at 23 C: Silica gel: 0 to 3 %; Magnesium nitrate Mg(NO3)2: 53 %; Calcium nitrate Ca(NO3)2: 50 %; Ammonium dihydrogen phosphate NH4H2PO4: 93 %; Potassium nitrate KNO3: 93 %. NOTE Ammonium phosphate is not compatible with metal. 8.3 Proc
